So colours represent specific emotions? Maybe? But who sets them. Is it a historical thing? Some countries have black as their colour of mourning. But others use white, and who knows what else might be favoured elsewhere. Red is hot, fast, speed, fast cars are often red. But what about red for danger. Traffic lights, live wires and of course blood? But red can be sweet like fruit too.
Green has been found to be calming, and maybe blue too. Linked with the colours of growing plants. Green indoor plants can calm workers. Now green walls of plants are fashionable.
Pink for girls, blue for boys. But a couple of hundred years ago it was the other way round. Perhaps our use of colours to represent emotions is just fashion and fad!